Buffer overflow in Tenda Hg9
CVE-2026-2908
A security vulnerability has been detected in Tenda HG9 300001138. Affected by this issue is some unknown functionality of the file /boaform/formLoopBack of the component Loopback Detection Configuration Endpoint. Such manipulation of the argument Ethtype leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (43.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Tenda Hg9 — versions 300001138
- Tenda Hg9_firmware — versions 300001138
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
- cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Third Party Advisory, exploit, Mitigation, Issue Tracking)
- cna@vuldb.com (Product, product)
Frequently asked questions
- What is CVE-2026-2908?
- CVE-2026-2908 is a high-severity vulnerability in Tenda Hg9, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-02-22.
- How severe is CVE-2026-2908?
- High severity. CVSS v3 base score is 8.8 out of 10.